Aug 15 Why water is the weirdest thing

Aug 15 Why water is one of the weirdest things in the universe | BBC Ideas
BBC Ideas｜为什么水是宇宙间最奇怪的物质之一？

Water. You might not see it, but this is probably the strangest things in the universe Here's why. Every molecule of water on the Earth and inside you or any other living thing has existed for billions of years. After it came to Earth, that water has been cycling through rocks, air, animals, plants and back again. Each molecule has been on an incredible voyage before coming to you. At some point, the water inside you would have been inside dinosaurs, bacteria, the oceans, storm clouds, the polar ice caps and much more.
水。你可能看不到它，但这可能是宇宙中最奇怪的事情，原因如下。地球上、你体内或任何其他生物体内的每一个水分子都已经存在了数十亿年。水来到地球后，一直在岩石、空气、动物、植物中循环，然后又回来了。每个分子在来到你身边之前都经历了一段不可思议的旅程。在某一时刻，你体内的水曾进入过恐龙、细菌、海洋、风暴云、极地冰盖等等。

All of the water on Earth is alien. They might be a familiar part of our world, but our oceans formed hundreds of millions of years after our planet took shape. The water arrived on asteroids and comets from space, objects from the edge of our solar system.
地球上所有的水都是外来的。它们可能是我们世界上熟悉的一部分，但我们的海洋是在地球形成后数亿年形成的。水从太空到达小行星和彗星上，这些物体来自我们太阳系的边缘。